Introduced ResourceRoute's serveResource() and serveCacheableResource…

…() utility methods

restx-core/src/main/java/restx/ResourcesRoute.java

@@ -14,6 +14,7 @@
 import java.net.URL;
 import java.util.Collections;
 import java.util.List;
+import java.util.Map;
 
 import static com.google.common.base.Preconditions.checkNotNull;
 
@@ -116,15 +117,7 @@ public void handle(RestxRequestMatch match, RestxRequest req, RestxResponse resp
                                                     || RestxContext.Modes.TEST.equals(ctx.getMode())
                                                     || RestxContext.Modes.INFINIREST.equals(ctx.getMode())
             );
-            resp.setLogLevel(RestxLogLevel.QUIET);
-            resp.setStatus(HttpStatus.OK);
-            String contentType = HTTP.getContentTypeFromExtension(relativePath).or("application/octet-stream");
-            Optional<CachedResourcePolicy> cachedResourcePolicy = cachePolicyMatching(contentType, relativePath);
-            if(cachedResourcePolicy.isPresent()) {
-                resp.setHeader("Cache-Control", cachedResourcePolicy.get().getCacheValue());
-            }
-            resp.setContentType(contentType);
-            Resources.asByteSource(resource).copyTo(resp.getOutputStream());
+            serveCacheableResource(resp, resource, relativePath);
         } catch (IllegalArgumentException e) {
             notFound(resp, relativePath);
         }
@@ -134,6 +127,32 @@ protected String requestRelativePath(RestxRequest req) {
         return req.getRestxPath().substring(baseRestPath.length());
     }
 
+    protected void serveCacheableResource(RestxResponse resp, URL resource, String relativePath) throws IOException {
+        String contentType = HTTP.getContentTypeFromExtension(relativePath).or("application/octet-stream");
+
+        ImmutableMap.Builder<String, String> headers = ImmutableMap.builder();
+        Optional<CachedResourcePolicy> cachedResourcePolicy = cachePolicyMatching(contentType, relativePath);
+        if(cachedResourcePolicy.isPresent()) {
+            headers.put("Cache-Control", cachedResourcePolicy.get().getCacheValue());
+        }
+
+        serveResource(resp, resource, contentType, headers.build());
+    }
+
+    protected void serveResource(RestxResponse resp, URL resource, String contentType) throws IOException {
+        serveResource(resp, resource, contentType, ImmutableMap.<String, String>of());
+    }
+
+    protected void serveResource(RestxResponse resp, URL resource, String contentType, Map<String, String> headers) throws IOException {
+        resp.setLogLevel(RestxLogLevel.QUIET);
+        resp.setStatus(HttpStatus.OK);
+        for(Map.Entry<String,String> headerEntry: headers.entrySet()) {
+            resp.setHeader(headerEntry.getKey(), headerEntry.getValue());
+        }
+        resp.setContentType(contentType);
+        Resources.asByteSource(resource).copyTo(resp.getOutputStream());
+    }
+
     protected Optional<CachedResourcePolicy> cachePolicyMatching(String contentType, String path) {
         for(CachedResourcePolicy cachedResourcePolicy : cachedResourcePolicies){
             if(cachedResourcePolicy.matches(contentType, path)){